The Gray Muzzle Ledger / Appetite, weight and thirst changes in senior pets

Appetite, weight and thirst changes in senior pets

Quick answerGradual weight loss, a new hunger or thirst, or a pet who stops eating are all worth recording and reporting. Do not wait for the next checkup. The numbers are easy to lose without a log.

Keep your senior pet’s whole story in your pocketPawLine keeps a health profile, daily notes and medication schedule for each pet, and lets you email the records to your vet.Every good day, on the record. Free to download. Try it free, no payment info needed, then decide after the trial.What is PawLine? An AI-powered pet health app whose answers draw on published veterinary research, including sources like PubMed. Ask health questions any hour, get emergency triage and first-aid steps, set medication reminders, keep a profile and daily notes for each pet and email them to your vet, and find nearby vets. Try it free for 30 days with no payment info needed; after the trial, continued access is an in-app purchase (weekly or yearly). Guidance only, not a diagnosis.

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Published Oct 19, 2026 · Updated Oct 19, 2026 · By the Editorial team. General education, not veterinary advice and not yet individually reviewed by a licensed veterinarian. About and sources

What to measure

Weight every 2 to 4 weeks on the same scale (or ask your clinic if you can drop in).
Meals eaten: all, half, none. Treats count.
Water: roughly how many bowls you refill, or ask the vet for a method.
Body condition and muscle: are ribs, spine or hips easier to feel?

Keep your senior pet’s whole story in your pocket

PawLine keeps a health profile, daily notes and medication schedule for each pet, and lets you email the records to your vet.

Download on theApp Store Get it onGoogle Play

Complete pet profilesBreed, age, weight, health conditions and photos for each pet, so advice fits that animal.
Daily health notesWrite down symptoms and observations, then share the records with your vet by email.
Medication remindersSet medication schedules for every pet, get push notifications, and track dosing history.

Every good day, on the record. Free to download. Try it free, no payment info needed, then decide after the trial.

What is PawLine? An AI-powered pet health app whose answers draw on published veterinary research, including sources like PubMed: instant health answers, emergency triage with first-aid steps, medication reminders, pet profiles and daily notes you can email to your vet, and nearby vet search. The 30-day free trial needs no payment info; after it, continued access is an in-app purchase, weekly or yearly (see the store listing). PawLine gives guidance and information, not a diagnosis. Always consult a licensed veterinarian for medical decisions.

What to report

Tell your veterinarian about unplanned weight loss, a pet who stops eating, a sudden increase in drinking or urinating, or repeated vomiting or diarrhea. Do not diagnose at home: many conditions of older pets, from dental pain to kidney or hormone problems, look similar from the outside.

Every good day, on the record. Get PawLine on the App Store · Get it on Google Play

Why labs matter

AAHA lists complete blood count, chemistry and urinalysis every 6 to 12 months for senior dogs and cats because aging changes often show up first in the blood. Your notes tell the vet when to look.

Frequently asked questions

How often should I weigh my senior pet?

There is no universal rule. Every few weeks, on the same scale, makes a useful trend. Ask your veterinarian about the schedule for your pet.

Keep your senior pet’s whole story in your pocket

PawLine keeps a health profile, daily notes and medication schedule for each pet, and lets you email the records to your vet.

Download on theApp Store Get it onGoogle Play

Complete pet profilesBreed, age, weight, health conditions and photos for each pet, so advice fits that animal.
Daily health notesWrite down symptoms and observations, then share the records with your vet by email.
Medication remindersSet medication schedules for every pet, get push notifications, and track dosing history.
Instant health answersAsk about a symptom, diet or behavior question and get a research-backed answer, day or night.
Emergency triageHelps you judge whether your pet needs urgent veterinary care, with step-by-step first aid while you get to the vet.
Nearby vets and pet placesFind vet clinics, dog parks, groomers and pet shops, and save favorites.
Birthday remindersA reminder before each birthday with breed facts.
Many speciesDogs, cats, birds, rabbits, reptiles, small pets, and livestock such as horses, goats, sheep, cows and chickens.

Every good day, on the record. Free to download. Try it free, no payment info needed, then decide after the trial.

Sources

2023 AAHA Senior Care Guidelines for Dogs and Cats (PDF) https://www.aaha.org/wp-content/uploads/globalassets/02-guidelines/2023-aaha-senior-care-guidelines-for-dogs-and-cats/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats.pdf
AAHA: Diagnostic tests and recommended frequencies for senior dogs and cats https://www.aaha.org/resources/2023-aaha-senior-care-guidelines-for-dogs-and-cats/diagnostic-tests-and-recommended-frequencies-for-senior-dogs-and-cats/

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Good days: a quality of life self-check for older petsA gentle seven-category scale (HHHHHMM, by Dr. Alice Villalobos) to notice changes and bring notes to your vet.Dog years calculator: dog age in human yearsConvert your dog’s age to human years with the UC Davis formula, 16 × ln(dog age) + 31. Why the old ×7 rule is wrong.When is a dog or cat considered senior?What “senior” means in the AAHA guidelines: the last 25% of a dog’s expected lifespan, and over 10 years for cats.How often should a senior pet see the vet?AAHA recommends a senior workup once or twice a year, with lab work every 6 to 12 months. What to ask and bring.